TACH!!! Or Tachometer. None of them are super accurate. Swapped eta to 7k Tach in my e30 before the M52 swap and noticed it was off. Many others have said BMW Speedo's and Tach's are all just off. Friend with a E90 his is 7mph off. Eta/M52 is 5mph off.
Last edited by Tkaczuk; 12-12-2012 at 04:25 PM.